(MEWPS) for tree work - Urban Access

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4. FIELD TRIAL EVALUATIONS AND RESULTS4.1 TRIAL DESCRIPTIONIn all the MEWP trials, a 3 man team was present, 2 men were in the basket, one for operating themachine and the other representing the arborist. A groundsman with knowledge of how to lower theplatform in case of emergencies was also present. The aborist in the basket and the groundsmanwere trained and experienced tree climbers with little or no prior operational experience of aMEWP. It would be possible for the arborist to operate the MEWP unaided, with appropriatetraining, for manoeuvring the machine to an appropriate working position. The MEWP operatorssupplied for the trial had no experience of using the MEWP in trees, all coming from aconstruction-based environment.The climbing trials consisted of a 2 man team, both qualified and experienced tree climbers.All the sites had trees requiring identified treatments. Consultants were used to help identifysuitable anchor points from where it was reasonable to expect climbing operations to start. Thesepoints were marked with red/white hazard tape as permanent markers.The trial times looked at the following elements for both MEWPs and climbing techniques:Approach to treeSet up (outriggers, levelling)Access to anchor points in treeReturn to transport positionDe-rig (outriggers in)Drive away.The climbers were free to use any recognised climbing technique as they saw fit. This resulted inthe use of friction knots on Site 1 and the use of ladders on Sites 2 and 3.4.2 SITE DESCRIPTIONS4.2.1 Site 1A group of 4 oak trees (Plate 1) with anchor point heights ranging form 12 m to 18 m. This woulddemonstrate the off-road and manoeuvring capabilities of each machine and was selected tosimulate a group of trees within a parkland/estate environment. Heavy rain the night before thetrials resulted in soft ground conditions for the trial. The types of operations to be carried out onthese trees included crown lifting, crown thinning and dead-wooding.9
Plate 1Oaks, site 14.2.2 Site 2An open-grown sycamore in a field (Plate 2). This tree was selected to simulate a parkland/estateenvironment to test the off road capabilities and the ability of the MEWP to access an anchor pointthrough a wide spreading dense crown. The operations to be carried out on this tree included deadwoodingand crown thinning.Plate 2Sycamore, site 210
Page 1 and 2: HSEHealth & SafetyExecutiveUse and
Page 3 and 4: © Crown copyright 2003First publis
Page 5 and 6: ParagraphPage10 RECOMMENDATIONS 431
Page 8 and 9: Use and Effectiveness of MEWPs in A
Page 10 and 11: 2 ADVANTAGES OF USING MEWPSThe rese
Page 12 and 13: 3. FACTORS AFFECTING MACHINE CHOICE
Page 14: For the purposes of selecting a MEW
Page 19 and 20: Scanlift SL 240This model is a self
Page 21 and 22: Plate 6Teupen Euro B20The machine w
Page 23 and 24: Plate 8Dino 210 XTThe machine was s
Page 25 and 26: The following scoring method was us
Page 27 and 28: MEWPAccessto siteManoeuvrabilityaro
Page 29 and 30: Manoeuvrability in crownAll the mac
Page 31 and 32: The RQG handled each of the sites w
Page 33 and 34: Site 2 caused problems to all MEWPs
Page 36: 5 MODIFICATIONS TO CURRENT WORKING
Page 39 and 40: Construction Training Award (CTA)/
Page 42 and 43: 7 GUIDANCE ON SELECTION OF MEWPsSec
Page 44 and 45: 8 DISCUSSION ON SAFETY AND EVALUATI
Page 46 and 47: 9 CONCLUSIONSMany of the arboricult
Page 48: 9.8 BASKET DESIGNBasket rotation ca
Page 52: 11 ACKNOWLEDGEMENTSThe following pe
Page 55 and 56: DRIVING ON SITEMake sure your MEWP
Page 57 and 58: Positioning of the machine is criti
Page 59 and 60: WarningsIf you are required to work
Page 61 and 62: Positioning of the machine is criti
Page 63 and 64: MEWP ChecklistPart 1 Preparation Ye
Page 65 and 66:
It is very important to realise tha
Page 67 and 68:
SELECTION OF APPROPRIATE MEWPSite a
Page 69 and 70:
Basket designBasket rotation can im
Page 71 and 72:
Risk assessmentsThe manager should
Page 73 and 74:
When moving the machine under or ne
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